Lamp



FIG. 1 is a perspective view of a lamp showing my new design;

FIG. 2 is a front view thereof; the left side, right side and rear views being substantially the same;

FIG. 3 is a top view thereof; and,

FIG. 4 is a bottom view thereof.

Grayscale shading illustrates contour, not any particular color. 

CLAIM The ornamental design for a lamp, as shown and described. 